Yes turrican II is a great CPC game. No music but the speed is good
And i'm not the only one to say that. (I own the game on tape on C64 LOL, 50 fps scroll but buy me another pair of eyes please XD).
About R-type 2, well, it's slow yes, but that's the point with this game. Yes Factor 5 should done better considering their latest titles like BC kid, or Turrican 2